Based on the given data, the total percentage of literates in the four cities together, round to one decimal, is .............

The total population of city $$B$$ = Total literates in city $$B$$ + Total illiterates in city $$B=200+100=300$$

Total literates in city $$D$$ = Total population of city $$D$$ - total illiterates in city $$D=120-90=30$$

now total percentage of literates in the four cities together = {(total literates in the four cities)/(total population of the four cities)} * 100

$$=(150+200+50+30)/(200+300+150+120)*100$$

$$=55.84$$ 

$$=55.8$$